Free-Radical Bromotrifluoromethylation of Olefin via Single-Electron Oxidation of NaSO<sub>2</sub>CF<sub>3</sub> by NaBrO<sub>3</sub>
作者:Zhong-Quan Liu、Dong Liu
DOI:10.1021/acs.joc.6b02812
日期:2017.2.3
A free-radical bromotrifluoromethylation of olefin by using NaSO2CF3 and NaBrO3 has been achieved. Sodium bromate acts not only as a single-electron oxidant but also as a bromine source. A radical-clock experiment and electron-spin-resonance detection support a radical process.
Zinc-Mediated Intermolecular Reductive Radical Fluoroalkylsulfination of Unsaturated Carbon-Carbon Bonds with Fluoroalkyl Bromides and Sulfur Dioxide
作者:Yongan Liu、Qiongzhen Lin、Zhiwei Xiao、Changge Zheng、Yong Guo、Qing-Yun Chen、Chao Liu
DOI:10.1002/chem.201805526
日期:2019.2.1
general zinc‐mediated intermolecular reductiveradical fluoroalkylsulfination of unsaturated C−C bonds has been developed using readily available fluoroalkyl bromides and 1,4‐diazabicyclo[2.2.2]octane‐bis(sulfur dioxide) adduct (DABSO) with wide substrate scope and excellent functional group tolerance. Sulfur dioxide anionradical generated in situ from the reduction of sulfur dioxide with zinc may be
Tautomycetin Synthetic Analogues: Selective Inhibitors of Protein Phosphatase I
作者:Zachary R. Woydziak、A. John Yucel、A. Richard Chamberlin
DOI:10.1002/cmdc.202000801
日期:2021.3.3
contact the hydrophobic groove of PP1/PP2A. In all 28 TTN analogues were synthetically generated that inhibit PP1/PP2A activity at <250 mM; seven possessed inhibition activity at 100 nM. The IC50 values were determined for the seven most active analogues, which ranged from 34 to 1500 nM (PP1) and 70 to 6800 nM (PP2A). Four of the seven analogues possessed PP1 selectivity, and one demonstrated eightfold
Visible-Light-Enabled <i>Ortho</i>-Selective Aminopyridylation of Alkenes with <i>N</i>-Aminopyridinium Ylides
作者:Yonghoon Moon、Wooseok Lee、Sungwoo Hong
DOI:10.1021/jacs.0c05025
日期:2020.7.15
By utilizing an underexplored reactivity mode of N-aminopyridinium ylides, we developed the visible-light-induced ortho-selective aminopyridylation of alkenes via radical-mediated 1,3-dipolar cycloaddition. The photocatalyzed single-electron oxidation of N-aminopyridinium ylides generates the corresponding radical cations that enable previously inaccessible 1,3-cycloaddition with a broader range of
通过利用 N-氨基吡啶鎓叶立德的未充分探索的反应模式,我们通过自由基介导的 1,3-偶极环加成开发了可见光诱导的烯烃邻位选择性氨基吡啶化。N-氨基吡啶鎓叶立德的光催化单电子氧化产生相应的自由基阳离子,使以前无法实现的1,3-环加成与更广泛的烯烃底物成为可能。所得的环加成加合物迅速进行随后的 NN 键均裂,赋予显着的热力学驱动力以产生各种 β-氨基乙基吡啶。值得注意的是,在无金属和温和条件下,氨基和吡啶基可以通过模块化控制邻位选择性和 1,2- 顺式非对映选择性安装到活化和未活化的烯烃中。
Hydrotrifluoromethylthiolation of Unactivated Alkenes and Alkynes with Trifluoromethanesulfonic Anhydride through Deoxygenative Reduction and Photoredox Radical Processes
作者:Yao Ouyang、Xiu‐Hua Xu、Feng‐Ling Qing
DOI:10.1002/anie.201911323
日期:2019.12.16
trifluoromethanesulfonic anhydride (Tf2 O) as a radical trifluoromethylthiolating reagent. Hydrotrifluoromethylthiolation of unactivatedalkenes and alkynes with Tf2 O in the presence of PMePh2 and H2 O under visible-light photoredox catalysis gave the addition products. The trifluoromethylthio radical (. SCF3 ) was first formed from Tf2 O through a photoredox radical processes and deoxygenative reduction of